RDF has seen increased adoption in recent years, prompting the standardization of the
SPARQL query language for RDF, and the development of local and distributed engines for …

A large number of published datasets (or sources) that follow Linked Data principles is
currently available and this number grows rapidly. However, the major target of Linked Data …

Abstract Billions of Linked Data triples exist in thousands of RDF knowledge graphs on the
Web, but few of those graphs can be queried live from Web applications. Only a limited …

A few years after Google announced that their 'Knowledge Graph'would have allowed
searching for things, not strings, 1 knowledge graphs start entering information retrieval …

Motivated by the ongoing success of Linked Data and the growing amount of semantic data
sources available on the Web, new challenges to query processing are emerging …

In order to leverage the full potential of the Semantic Web it is necessary to transparently
query distributed RDF data sources in the same way as it has been possible with federated …

A large number of datasets are being made available on the Web using a variety of formats
and according to diverse data models. Ontology Based Data Integration (OBDI) has been …

Efficient federated query processing is of significant importance to tame the large amount of
data available on the Web of Data. Previous works have focused on generating optimized …

We propose techniques for processing SPARQL queries over a large RDF graph in a
distributed environment. We adopt a “partial evaluation and assembly” framework …

Abstract The Web of Data has grown enormously over the last years. Currently, it comprises
a large compendium of interlinked and distributed datasets from multiple domains. Running …